jackson



WOOD & JACKSON.

Improvement in Furnaces for the Mechanical Puddling of Iron.

N0. 129,199". P atented lflly 16,1872.

\ S/ITNESSES. S NVENTURS.

UNITED STATES PATENT OFFICE.

RICHARD G. W'OOD AND JOSEPH R. JACKSON, OF MGKEESPORT, PA.

IMPROVEMENT IN FURNACES FOR THE MECHANICAL PUDDLING .OF IRON.

Specification forming part of Letters Patent No. 129,199, dated July 16, 1872.

SPECIFICATION.

To all whom it may concern:

Be it known that we, RICHARD G. W001) and J osEPH It. JACKSON, of McKeesport, in the county of Allegheny and State of'Pennsylvania, have invented a new and useful Improvement in Furnaces and we do hereby declare the following to be a full, clear, and exact description thereof, reference being bad to the accompanying drawing making a part of this specification, in which- Figure l is a longitudinal section of our improved furnace. Fig. 2 is a vertical section of the same through y y, Fig. 1. 7

Like letters of reference indicate like parts in each.

Our invention consists in the application to a puddling-furnace, having a movable or rotating bed of the parts and devices hereinafter claimed.

In the drawing, a represents the fire-chamber, furnished with grate a and fire-bridge a. The chamber a opens back into the cylinder or chamber b, which is supported at its forward end upon the plumber-block c and at the afterend upon the neck-Wall d. The furnace is provided with a neck, a, leading to the stack 1), both of the usual construction. The cylindrical chamber 11 with its trunnions b b is constructed with an inner and outer shell, e 6 the inner shell 0 being smaller than the outer shell 6', so as to form a cavity or chamber, 0, between them, which extends entirely around the cylinder b and in the trunnions b b, and forms a water-chamber or box for the purpose of protecting the trunnions and the sides of the cylinder from heat. Water is admitted through the pipe f and escapes through the pipe f The hollow trunnions or journals 1) 12 turn on the plumber-blocks c c and form tight joints with the walls of the fire-chamber and the neck, so as to admit little or no air into the furnace. At the lower side of the cylinder 12 is a cast-iron blast-pipe, h, from which the tuyeres i i open into the interior of the cylinder b. The blast-pipe his connected with a pressure air-blast by means of a flexible tube, k, which is long enough to permit the oscillation of the chamber 1). The cylindrical chamber 11- is oscillated by means of the pinion l, which meshes into the rack or wheel m on the cylinder, and is operated by power communicated through suitable mechanical devices for giving it either a rotary or reciprocating motion. The cylinder b has an opening, a, closed by a suitable door, through which it is charged and the ball is removed. The upper half of the chamber b-that is, the part be tween the ledges 0 0-is lined with fire-brick, so as to form a refractory roof, p, shaped like the segment of a circle, the radius of which is longer than that describing the circumference of the chamber b, and the center of which would be at a point below the center of the chamber b, and which roof is designed to reduce the empty space in the upper part of the chamber b and thereby decrease the amount of waste heat. This furnace does not require an ore fixing. The inner sides of the trunnions are lined with fire-brick, as at s s.

The operation is as follows: The cylinder b is turned until the opening a is brought around to the side, in which position it is charged and the iron is melted. The water in the chamber 0 chills the cinder which comes in contact with the inner shell 6 and causes it to set or harden against it, between the projecting edges r r of brick-work p, and form a bed or bottom, upon which the iron is worked. The cylinder is then turned up to its right position and oscillated, and the blast is applied. This application of the blast during the oscillating of the cylinder brings the air in contact with every portion of the molten iron and the whole is thoroughly and equally worked. The blast is sufficiently powerful to keep the tuyeres i i clear of the molten iron and cinder. When the iron becomes balled the cylinder is turned over so as to bring the door to its side, and the balls are removed in the usual way; or, by detaching the pipes 70 f, the cylinder may be turned until the ball will roll out through the door a upon a carriage placed beneath to receive it.

By our invention we secure a joint between the fire-chamber and neck of the furnace, make use of water in protecting the same and the sides of the cylinder from the heat, and se cure the application of the air-blast to an oscillatin g furnace. We are enabled, by the protection of the sides of the furnace by the wa ter and by its action on the cinder, to dispense with'the use of fixing by ore; and by the thorough and complete working of the iron by means of the oscillating motion, combined with the application of the air-blast, a superior iron is produced.

We are aware that the body part of a rep, volviug furnace has been surrounded by a 2. The application of an air-blast to the rocking-chamber b so as to blow the air into and through the molten metal, substantially as described and for the purposes set forth.

3. The cylindrical chamber b, having a roof, 1), constructed of the shapedescribed so as to reduce the empty space in the upper part of chamber, substantially as described.

In testimony whereof we, the said RICHARD G. WOOD and JOSEPH R. JACKSON, have hereunto set our hands.

RICHARD Gr. WOOD. JOSEPH R. JACKSON. Witnesses:

JAMES H. BERRY, GEO. E. HUEY. 

